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Thursday, January 5, 2017

January 5, 2017

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JANUARY…

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BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JANUARY 5, 2017 ALL TIMES ARE IN EASTERN STANDARD TIME WINTER FEEL RETURNS TODAY WITH COOLER TEMPS AND GUSTY WINDS After a very warm start to the month, a more winter-like feel has returned to the air today.  The morning low was still a relatively mild 23F, but we’ve seen only a slow rise of the temperature to 30F through 1:00 P.M. Winds have been gusty as well out of the west, helping to lock in this cool, dry air.  Several gusts of around 35mph occurred during the mid-morning, with breezy conditions continuing into the afternoon.  Plenty of sunshine has been observed today, although high clouds have created a thin veil over most of the sky by early afternoon.  Visibility has been excellent, improving to 80 miles this afternoon. Rain and snow squalls passed through the region last night.  Only a trace of snow was recorded here with 0.03 ins. of liquid.  The squall passages were easily discernible on our wind charts, with each one corresponding to a sudden uptick in the wind.  A peak gust of 41mph was recorded. It appears 2016 will go down as the 2nd warmest year on record here at the Observatory.  A list of our ten warmest years, along with preliminary statistics for December, are below. BLUE HILL OBSERVATORY WARMEST ANNUAL TEMPERATURE 1885-2016 (deg F) 1) 51.7 in 2012 2) 51.2 in 2016 3) 51.0 in 2010 4) 50.9 in 1999 5) 50.8 in 1998 6) 50.6 in 2006 7) 50.5 in 1953 8) 50.4 in 2011 9) 50.3 in 1990, 1991 PRELIMINARY STATS FOR DECEMBER 2016 TEMPERATURE, Deg. F Avg. Max. 39.5 [+0.4] Avg. Min. 25.3 [+1.7] Mean      32.4 [+1.1] 24-hour corrected mean: 32.1 Max. for month: 56F on 27th Min. for month:  1F on 16th HEATING DEGREE DAYS Total heating units: 1002 [-41] Total for the season: 2032 [-273] Total for last season: 1656 PRECIPITATION, Inches Total: 2.83 [-2.06] Greatest in 24 hrs: 0.87 in. on 29th-30th SNOWFALL, Inches Total: 7.8 [-5.6] Greatest in 24 hrs: 4.3 in. on 17th WIND, mph Avg. uncorrected wind speed: 13.4 Avg. corrected wind speed: 13.7 Prevailing wind direction: W at 19% Peak gust and direction: 51 SW on 27th SUNSHINE: Campbell-Stokes card minutes: 8604 mins. of possible 16470 mins. or 52% Astronomical total minutes: 8881 mins. of possible 16991 mins. or 52% Today’s Observations: 7 A.M. Weather: Clear, few stratocumulus WNW-NW and distant NNE-S, few altocumulus SE-W Temperature: 23F; Dew Point: 12F; Wind: W at 15G22 kts Sea-level pressure: 29.79 ins. Hg, rising Visibility: 55 miles 6-hr Max temp: 29F 6-hr Min temp: 23F 24-hr precip: 0.03 ins. 24-hr snowfall: Trace BHO SA 1155 CLR 55 088/23/12/2715G22/979/ FEW SC WNW-NW AND DSNT NNE-S FEW AC SE-W NEW SNW PST 24 HRS TRACE/ 8/530 52038 MANUAL 70003 ASOS 70003 10029 20023 10 A.M. Weather: Scattered cirrus, few stratocumulus distant SW-N and NE-S, dense cirrus SSE-SW, patches of cirrocumulus overhead and SW Temperature: 27F; Dew Point: 10F; Wind: W at 19G28 kts, Wind: Peak Wind 32 kts W at 9:30 A.M. Sea-level pressure: 29.86 ins. Hg, rising then more slowly Visibility: 70 miles BHO SA 1455 250 SCT 70 112/27/10/2719G28/986/ FEW SC DSNT SW-N AND NE-S DNS CI SSE-SW PTCHS CC OVHD AND SW PK WND 2732/30/ 8/509 51024 1 P.M. Weather: Broken altostratus, broken cirrus, few stratocumulus distant all quadrants except E-SSW, few altocumulus and altocumulus lenticularis distant WSW-N, partial solar halo Temperature: 30F; Dew Point: 11F; Wind: W at 12 kts, Wind: Peak Wind 27 kts W at 12:10 P.M. Sea-level pressure: 29.83 ins. Hg, rising then falling Visibility: 80 miles 6-hr Max temp: 30F 6-hr Min temp: 23F BHO SA 1755 E180 BKN 250 BKN 80 101/30/11/2712/983/ FEW SC DSNT ALQDS XCPT E-SSW FEW AC/ACSL DSNT WSW-N PRTL SOLAR HALO PK WND 2627/10/ 8/571 58011 10030 20023 SUMMARY FOR WEDNESDAY, JANUARY 4, 2017 TEMPERATURE (DEGREES F) MAX…..44   NORMAL…..34 MIN…..30   NORMAL…..18 MEAN….37   NORMAL…..26 DEPARTURE FROM 30-YEAR NORMAL…………………..+11 TOTAL DEPARTURE FOR THE MONTH…………………..+40 [+9.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY…………..28   DEPARTURE………-11 TOTAL HEATING UNITS FOR THE MONTH………….114   DEPARTURE………-40 TOTAL HEATING UNITS FOR THE SEASON………..2146   DEPARTURE……..-312 TOTAL HEATING UNITS LAST SEASON TO DATE……1797   DIFFERENCE…….+349 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY……………….41 WNW AT 8:40 P.M. ASOS……………………42 WNW AT 8:41 P.M. DAVIS…………………..37 W   AT 8:40 P.M. RMY 45 FASTEST MILE FOR YESTERDAY…………………29 WNW AT 8:46 P.M.* MAXIMUM 2-MINUTE ASOS AVERAGE………………30 WNW AT 8:42 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE……………..30 W   AT 8:42 P.M. AVERAGE WIND SPEED AND DIRECTION………….12.1 SW ASOS………………….11.5 DAVIS…………………10.9 WSW [251 deg.] *Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.03  DEPARTURE……-0.11 ASOS…………..0.03 TOTAL PRECIPITATION FOR THE MONTH……….1.34  DEPARTURE……+0.76 ASOS…………..1.40 TOTAL PRECIPITATION FOR THE YEAR………..1.34  DEPARTURE……+0.76 ASOS…………..1.40 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..TRACE  DEPARTURE…….-0.6 TOTAL SNOWFALL FOR THE MONTH…………..TRACE  DEPARTURE…….-2.3 TOTAL SNOWFALL FOR THE SEASON……………7.8  DEPARTURE……-10.5 PRELIMINARY CLIMATE SUMMARY FOR DECEMBER-JANUARY CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system gust RMY:  R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ….: Data not yet available, records not finalized M:    Missing data 12/1  55/39/47/+10/0.20/0.0/385/69          36 W   AERO 37 W   RMY 36 12/2  48/34/41/+5/0.00/0.0/535/96           32 W   AERO 32 W   RMY N/A 13/3  44/31/38/+2/0.00/0.0/445/80           37 WNW AERO 39 WNW RMY 40 12/4  39/27/33/-2/0.00/0.0/355/64           25 NW  AERO 25 NW  RMY N/A 12/5  36/27/32/-3/0.13/0.4/000/00           26 W   AERO 25 W   RMY 29 12/6  42/30/36/+1/0.00/0.0/392/71           22 W   AERO 21 W   RMY N/A 12/7  39/34/37/+3/0.10/0.0/000/00           21 E   AERO 21 E   RMY N/A 12/8  40/29/35/+1/0.00/0.0/033/06           30 W   AERO 31 W   RMY 33 12/9  35/21/28/-6/0.00/0.0/549/100          35 W   AERO 36 WNW RMY 34 12/10 27/17/22/-11/0.00/0.0/544/99          26 WNW AERO 27 WNW RMY 29 12/11 33/16/25/-8/0.06/0.4/411/75           17 SSW AERO 15 SW  RMY N/A 12/12 41/27/34/+1/0.35/0.9/038/07           29 ESE AERO 29 SE  RMY 30 12/13 41/30/36/+4/0.00/0.0/427/78           25 WSW AERO 25 W   RMY 27 12/14 40/26/33/+1/0.00/0.0/530/97           30 WNW AERO 31 WNW RMY N/A 12/15 29/13/21/-11/T/T/420/77               50 W   AERO 62 W   RMY 56 12/16 18/01/10/-21/0.00/0.0/485/89          39 WNW AERO 51 WNW RMY N/A 12/17 36/18/27/-4/0.60/4.3/000/00           25 SSW AERO 28 SSW RMY N/A 12/18 55/30/43/+12/0.05/0.0/000/00          47 WSW AERO 53 S   RMY 53 12/19 30/17/24/-6/0.00/0.0/273/50           26 WNW*AERO 28 NW  RMY 26 12/20 32/13/23/-7/0.00/0.0/359/66           28 SSE AERO 29 SSW RMY N/A 12/21 40/25/33/+3/0.00/0.0/354/65           28 SSE AERO 28 SSW RMY 30 12/22 38/29/34/+5/T/T/033/06                28 SSE AERO 29 S   RMY 30 12/23 44/29/37/+8/0.00/0.0/512/94           25 WNW AERO 25 WNW RMY N/A 12/24 41/34/38/+9/0.39/0.0/033/06           30 SSW AERO 31 SSW RMY 30 12/25 43/25/34/+6/0.00/0.0/545/100          35 NW  AERO 37 NW  RMY 36 12/26 46/20/33/+5/…./0.0/425/78           39 S   AERO 40 S   RMY N/A 12/27 56/35/46/+18/…./0.0/169/31          51 SW  AERO 55 SW  RMY N/A 12/28 40/29/35/+7/0.00/0.0/207/38           31 W   AERO 32 W   RMY 26 12/29 40/28/34/+7/0.87/1.8/000/00           38 NW  AERO 44 NW  RMY 42 TSTM 12/30 37/26/32/+5/0.00/0.0/323/59           46 W   AERO 55 WSW RMY 50 12/31 43/23/32/+5/…./0.0/099/18           46 SSW AERO 51 SSW RMY 50 1/1   41/29/35/+8/…./0.0/…/..           35 W   AERO 36 W   RMY 34 1/2   38/29/34/+7/…./0.0/…/..           21 E   AERO 20 E   RMY N/A 1/3   42/37/40/+14/…./0.0/000/00          39 ENE AERO 41 ENE RMY 34 1/4   44/30/37/+11/…./T/…/..            41 WNW AERO 46 WNW RMY 45 1/5 Low temp since midnight is 23F; normal low is now 18F DAILY RECORDS FOR DECEMBER 2016 None. DAILY RECORDS FOR JANUARY 2017 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 5 HIGH 61F IN 2007 LOW -9F IN 1981 PRECIP 0.98 INS. IN 1993 SNOW 4.5 INS. IN 1891 PEAK GUST 70 MPH WNW IN 1959 RECORDS FOR JANUARY 6 HIGH 66F IN 2007 LOW -14F IN 1896 PRECIP 3.10 INS. IN 1889 [RECORD FOR MONTH] SNOWFALL 7.5 INS. IN 1893 PEAK GUST 70 MPH WNW IN 1959 TODAY’S REPORT PREPARED BY: Jonathan O’Brien
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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
Part I — Data Use Policy
§ 01

Ownership and Proprietary Rights

All observational records, compiled datasets, metadata, database structures, and related materials provided by the Blue Hill Observatory & Science Center are the exclusive property of the Blue Hill Observatory & Science Center. The Observatory has maintained continuous weather observations at the summit of Great Blue Hill since 1885, and the entirety of that record — its compilation, structure, curation, and organization — constitutes a proprietary database protected under applicable United States law, including copyright law and common law database protections.

All rights not expressly granted in this Policy are reserved by the Observatory. No access to or use of Observatory data shall be construed as a waiver of any rights or as a license to use data beyond the scope expressly stated herein.

§ 02

Governing Law and Jurisdiction

This Policy shall be governed by and construed in accordance with the laws of the Commonwealth of Massachusetts, without regard to its conflict of law provisions. For interactions with international users, this Policy shall apply to the maximum extent permitted by applicable local law.

Any dispute arising from or related to this Policy shall be subject to the exclusive jurisdiction of the state and federal courts located in Norfolk County, Massachusetts. By accessing Observatory data, all users consent to personal jurisdiction in Massachusetts and waive any objection to the venue or inconvenience of such forum.

§ 03

Permitted Uses

Observatory data are made available for the following limited, non-commercial purposes only:

  • Personal study and analysis
  • Educational classroom use
  • Student projects
  • Non-commercial academic research
  • Publication of analyses, figures, models, or conclusions derived from the data, subject to the attribution requirements of Section 4

All other uses require prior written authorization from the Observatory.

§ 04

Attribution Requirement

Any use of Observatory data in any published, presented, or publicly distributed work must include the following verbatim acknowledgment:

“Data provided by the Blue Hill Observatory & Science Center, Milton, Massachusetts. Continuous weather observations since 1885.”

Failure to include proper attribution is a material violation of this Policy.

§ 05

Prohibited Uses

Unless explicitly authorized in writing, Users may not:

  • Resell, license, sublicense, or commercially exploit Observatory data in any form
  • Redistribute the dataset in whole or in part to any third party
  • Publish the dataset for download by third parties
  • Host, mirror, or archive the dataset on any external website, repository, or storage service
  • Upload the dataset to any public or institutional data repository
  • Provide the data through APIs, automated services, or subscription platforms
  • Incorporate the data into any commercial product, software, application, or service
  • Use the data for AI or machine learning systems intended for commercial use or external distribution
  • Use the data to create derivative datasets that enable reconstruction of the underlying observations
§ 06

Commercial Licensing

Organizations seeking to use Observatory data for commercial purposes must obtain a license prior to any such use. Licensing inquiries: data@bluehill.org.

§ 07

Automated Access

Automated scraping, bulk harvesting, or systematic downloading of Observatory data is strictly prohibited without prior written authorization.

§ 08

Enforcement and Remedies

Violation of this Policy may result in immediate revocation of data access, pursuit of legal remedies available under United States law, and referral to applicable authorities. The Observatory reserves all rights to seek injunctive relief, damages, and attorneys’ fees in connection with any unauthorized use of its data.

Part II — Privacy Policy
§ 09–10

Scope & Information Collected

This section governs the collection, use, storage, and disclosure of personal information from visitors to the Blue Hill Observatory website and users of its data services. The Observatory may collect contact information (name, email, organization) when voluntarily submitted, usage data including IP addresses and pages visited, and data download records.

§ 11–12

How We Use Information & Retention

Information is used solely for: responding to inquiries and licensing requests; monitoring and enforcing compliance with this Policy; improving website performance; and communicating Observatory news to opted-in users. The Observatory does not sell, rent, or share personal information with third parties for marketing purposes. Data access records may be retained indefinitely for compliance and enforcement purposes.

§ 13

International Users and Data Transfers

The Observatory is located in the United States. International users acknowledge their information will be processed in the United States under U.S. law. Users requiring specific data processing agreements under non-US law must contact data@bluehill.org before accessing data.

§ 14–16

Cookies, Security & Children’s Privacy

The Observatory website may use cookies for analytics and functionality. By continuing to use the site, users consent to cookie use. The Observatory implements reasonable measures to protect personal information but cannot guarantee absolute security. Observatory data services are not directed at children under 13.

Part III — General Provisions
§ 17–20

Modifications, Severability, Entire Agreement & Contact

The Observatory reserves the right to modify this Policy at any time. Updated versions will be posted at bluehill.org. Continued use of Observatory data following any modification constitutes acceptance of the revised Policy. This Policy constitutes the entire agreement between the User and the Observatory. Questions and licensing inquiries: Blue Hill Observatory & Science Center, Milton, Massachusetts — data@bluehill.org

By accessing, downloading, or using any Blue Hill Observatory data or services, you acknowledge that you have read, understood, and agree to be bound by this Policy.
Effective January 1, 2025 · Blue Hill Observatory & Science Center · Milton, Massachusetts
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